Abstract

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Title:: Elastoplastic Response Analysis of Framecore Tube Structure Under Severe Earthquake Actions

Author(s):: WANG Peng; SHI Qing-xuan; WANG Feng; SHENG Hua-chun; School of Civil Engineering, Xi’an University of Architecture and Technology

Keywords:: frame-core tube structure; biaxial severe earthquake action; elasto-plastic analysis; earthquake input angle

Abstract:: Based on the finite element software, elasto-plastic time history analysis of a framecore tube structure under axial or biaxial severe earthquake actions was carried out. By contrasting, the effects on building top displacement, drift, relative torsion angle of floor and the relative acceleration of structure were analyzed. At the same time, the effect of earthquake input angle on the building was studied. The results indicate that the drift curves of structure under axial or biaxial earthquake actions are similar. However, the drifts of structure under biaxial actions are bigger than those under axial actions. The floor torsion angle is affected significantly by the ground motion characteristics. Furthermore, the peak value of floor torsion angle occurs at the top of the building. The peak value of relative acceleration occurs at the 1/5-3/5 structure height or at the top. The building response is influenced obviously by the earthquake input angle.